CN111177935B - Performance simulation method for observation space debris of spliced view field of photoelectric telescope - Google Patents
Performance simulation method for observation space debris of spliced view field of photoelectric telescope Download PDFInfo
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Abstract
The invention provides a performance simulation method for observation space debris of a spliced view field of a photoelectric telescope, which comprises the following steps: establishing a detection capability evaluation model of a single photoelectric telescope; determining the value range of the photoelectric telescope pointing direction, and performing splicing combination design on a plurality of photoelectric telescope view fields; scanning the space debris by adopting a single elevation angle region or scanning the space debris by adopting a multi-elevation angle region until the simulation is finished; and outputting the simulation detection result of the space debris. The method designs a visual field splicing combination mode and a scanning mode of the photoelectric telescope, combines a detection capability evaluation model of a single photoelectric telescope, finally simulates and obtains the number of space debris detected by the photoelectric telescope, is favorable for selecting basic parameters of the photoelectric telescope in the initial construction stage of the photoelectric telescope and selecting an observation strategy when the photoelectric telescope operates, pre-evaluates the influence of the visual field splicing combination and different scanning modes of the photoelectric telescope on space debris observation, provides a suggestion for space debris observation, and avoids observation waste.
Description
Technical Field
The invention relates to the technical field of telescopes, in particular to a performance simulation method for observing space debris by a splicing view field of a photoelectric telescope.
Background
The frequent space activities of human beings lead to the increasing number of space fragments, and seriously threaten the on-orbit operation safety of the spacecraft. The photoelectric telescope is an important means for observing space debris, particularly has advantages in medium and high orbit, and generally processes observation data to obtain information such as space debris positions and the like, so as to provide reference suggestions for judging whether a spacecraft performs maneuver evasion or not and how to perform maneuver evasion. In order to more effectively observe the space debris by using the photoelectric telescope, the layout of the observation station, the detection capability of the photoelectric telescope and the observation strategy need to be evaluated. The photoelectric telescope detection capability evaluation simulation technology is an important means for carrying out the above evaluations.
At present, in order to evaluate the detection capability of space observation of a photoelectric telescope, related researchers obtain the detection signal-to-noise ratio of space debris signals by establishing a detection capability evaluation model of a single photoelectric telescope and comprehensively considering the influences of the geometrical relationship of the space debris, the signal radiation quantity of a background source and the like, and the detection signal-to-noise ratio is used as a basis for detecting whether the space debris in the field of view of the photoelectric telescope can be detected or not, so that reference is provided for the actual observation of the space debris.
However, since the field of view of the photoelectric telescope is generally small, a single photoelectric telescope cannot detect a plurality of space debris at one time in the detection process, so that the detection capability evaluation model of the single photoelectric telescope only provides a reference suggestion for the influence of the single photoelectric telescope on the observation of the space debris, and cannot evaluate the influence of the field of view expanded by a plurality of photoelectric telescopes on the observation of the space debris in advance.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a performance simulation method for observation space debris of a spliced view field of a photoelectric telescope.
The invention provides a performance simulation method for observation space debris of a spliced view field of a photoelectric telescope, which comprises the following steps:
establishing a detection capability evaluation model of a single photoelectric telescope;
determining a value range pointed by a photoelectric telescope, and carrying out splicing combination design on a plurality of photoelectric telescope fields according to the value range pointed by the photoelectric telescope, wherein the photoelectric telescope points to an elevation angle comprising the photoelectric telescope and an azimuth angle comprising the photoelectric telescope;
according to the splicing combination design, scanning space debris by adopting a single elevation angle region or scanning space debris by adopting a multi-elevation angle region;
and outputting a simulation detection result of the space debris according to the detection capability evaluation model of the single photoelectric telescope.
Further, the establishing of the single telescope detection capability evaluation model comprises the following steps:
considering the position relation of the space debris relative to the photoelectric telescope and the sky-light-ground shadow relation;
on the basis that the space debris meet the position relationship and the sky-light-earth-shadow relationship, calculating the light signal radiation quantity reflected by the space debris and received by the photoelectric telescope detector and the night-light background signal radiation quantity;
calculating the signal-to-noise ratio of the space debris observed by the photoelectric telescope according to the radiation quantity of the optical signal and the radiation quantity of the night light background signal;
and according to the space debris signal-to-noise ratio, simulating and calculating the number of the space debris detected by the photoelectric telescope, and outputting a simulation detection result of the space debris according to the number of the space debris.
Further, the formula of the space debris signal-to-noise ratio is:
in the formula: r SN Is the space debris signal-to-noise ratio; s obj The radiation quantity of the optical signal reflected by the space debris received by the photoelectric telescope; s back Is night sky light background signal quantity; t is t int Is the exposure time; k is a radical of dark The current is the dark current of the photoelectric telescope detector; k is a radical of rdout Noise for reading out the photoelectric telescope detector; r is the photometric radius.
Further, the method for determining the value range of the photoelectric telescope pointing direction comprises the following steps:
determining the value range of the elevation angle of the photoelectric telescope, and selecting the interval value Fov 1 Degree, according to a selected interval value
Starting, taking 1 interval point every 1 interval value, and generating an elevation sequence of the photoelectric telescope at least comprising 2 interval points;
determining the value range of the azimuth angle of the photoelectric telescope, and selecting the interval value Fov 2 Degree, according to a selected interval value
Starting, taking 1 interval point every 1 interval value, and generating a photoelectric telescope azimuth sequence at least comprising 2 interval points;
wherein the photoelectric telescope field of view is Fov 1 *Fov 2 Degree of square, fov 1 The value of the field of view of the photoelectric telescope in the elevation direction, fov 2 The numerical value of the field of view of the photoelectric telescope in the azimuth direction is shown.
Further, the splicing and combining design of the plurality of photoelectric telescope fields of view comprises:
determining the pointing direction of each photoelectric telescope according to the acquired interval points within the value ranges of the elevation angle and the azimuth angle of the photoelectric telescope;
and splicing and combining the fields of view of the plurality of photoelectric telescopes according to the pointing direction of each photoelectric telescope.
Further, the single elevation area scanning space debris comprises:
s1: all the photoelectric telescopes keep the respective initial elevation angles unchanged, and all the photoelectric telescopes move simultaneously along the respective azimuth angle directions every time from the initial azimuth angle
Scanning the space debris until the azimuth angle of the photoelectric telescope with the minimum initial azimuth angle is more than 360 degrees;
s2: returning the azimuth angle of the photoelectric telescope with the minimum initial azimuth angle to 0 degree, taking the photoelectric telescope with the minimum initial azimuth angle as the initial azimuth angle, subtracting 360 degrees from the azimuth angles of the rest photoelectric telescopes, taking the azimuth angle obtained by subtracting 360 degrees from the azimuth angles of the rest photoelectric telescopes as the initial azimuth angle, and repeating the step S1 until the simulation time is finished;
wherein A is 1t The elevation angle of the photoelectric telescope; a is the number of photoelectric telescopes placed along the azimuth direction.
Further, the multi-elevation region scanning space debris comprises:
p1: all the photoelectric telescopes keep the respective initial elevation angles unchanged, and all the photoelectric telescopes move simultaneously along the respective azimuth directions every time from the initial azimuth angles
Scanning the space debris until the azimuth angle of the photoelectric telescope with the minimum initial azimuth angle is more than 360 degrees;
p2: elevation angle increase of all photoelectric telescopes
Judging whether the elevation angle of the photoelectric telescope with the minimum initial elevation angle is larger than the maximum elevation angle in the elevation angle sequence of the photoelectric telescope, if so, finishing simulation, and if not, entering P3; />
P3: all the photoelectric telescopes take the elevation angle with the increased angle as an initial elevation angle, the azimuth angle of the photoelectric telescope with the minimum initial azimuth angle is returned to 0 degree, the photoelectric telescope with the minimum initial azimuth angle takes 0 degree as the initial azimuth angle, the azimuth angles of the rest of the photoelectric telescopes subtract 360 degrees, the azimuth angles obtained by subtracting 360 degrees of the rest of the photoelectric telescopes take the initial azimuth angles as the initial azimuth angles, and the steps P1 and P2 are repeated;
wherein b is the number of the photoelectric telescopes arranged along the elevation direction.
Further, the outputting the simulation detection result of the space debris comprises:
respectively calculating the quantity of the space debris detected by the single photoelectric telescope in each scanning process by utilizing the single telescope detection capability evaluation model according to the space debris scanned by the single elevation angle area or the space debris scanned by the multi-elevation angle area;
calculating the detection space debris quantity of all the photoelectric telescopes after the scanning is finished according to the space debris quantity detected by the single photoelectric telescope;
and outputting the simulation detection result of the space debris according to the detection space debris quantity of all the photoelectric telescopes.
The invention provides a performance simulation method for observing space debris by splicing visual fields of photoelectric telescopes, which comprises the steps of establishing a detection capability evaluation model of a single telescope, determining a value range pointed by the photoelectric telescope, splicing and combining the visual fields of the photoelectric telescopes, scanning the space debris by adopting a single elevation angle area or a multi-elevation angle area until simulation is finished, and outputting a simulation detection result of the space debris according to the established detection capability evaluation model of the single telescope. The method designs a field splicing combination mode and a scanning mode of the photoelectric telescope, combines a detection capability evaluation model of a single telescope, finally obtains the number of space debris detected by the photoelectric telescope combination, is beneficial to selection of basic parameters of the photoelectric telescope at the initial construction stage of observation equipment of the photoelectric telescope and selection of observation strategies during operation of the observation equipment, pre-evaluates the influence of the field splicing combination and different scanning modes of the photoelectric telescope on space debris observation, provides suggestions for space debris observation, and avoids observation waste.
Drawings
FIG. 1 is a flow chart of a performance simulation method for observing space debris by a splicing view field of a photoelectric telescope according to an embodiment of the present invention;
FIG. 2 is a flowchart of a method for establishing a single telescope detectability assessment model according to an embodiment of the present invention;
FIG. 3 is a flow chart of a method for scanning space debris in a single elevation area according to an embodiment of the present invention;
fig. 4 is a flowchart of a method for scanning space debris in multiple elevation zones according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a flowchart of a performance simulation method for observing space debris by a splicing view field of an optoelectronic telescope according to an embodiment of the present invention. The performance simulation method for the observation space debris of the spliced view field of the photoelectric telescope provided by the embodiment of the invention comprises the following steps:
a: establishing a detection capability evaluation model of a single photoelectric telescope;
b: determining a value range pointed by a photoelectric telescope, and performing splicing combination design on a plurality of photoelectric telescope view fields according to the value range pointed by the photoelectric telescope, wherein the photoelectric telescope points to an elevation angle and an azimuth angle of the photoelectric telescope;
c: according to the splicing combination design, scanning space debris by adopting a single elevation angle region or scanning space debris by adopting a multi-elevation angle region;
d: and outputting a simulation detection result of the space debris according to the detection capability evaluation model of the single photoelectric telescope.
Wherein step a can be performed before step b or after step c, and the order of step b and step c is not interchangeable.
The embodiment of the invention establishes a single telescope detection capability evaluation model, determines the value range pointed by the photoelectric telescope, splices and combines the visual fields of the plurality of photoelectric telescopes, scans space debris by adopting a single elevation angle area or scans the space debris by adopting a multi-elevation angle area until the simulation is finished, and outputs the simulation detection result of the space debris according to the established single telescope detection capability evaluation model. The method designs a field splicing combination mode and a scanning mode of the photoelectric telescope, combines a single telescope detection capability evaluation model, finally obtains the number of space debris detected by the photoelectric telescope combination, is beneficial to selection of basic parameters of the photoelectric telescope at the initial construction stage of observation equipment of the photoelectric telescope and selection of observation strategies when the observation equipment operates, pre-evaluates the influence of the field splicing combination and different scanning modes of the photoelectric telescope on space debris observation, provides suggestions for space debris observation, and avoids observation waste.
Specifically, referring to fig. 1, a performance simulation method for observation space debris of a spliced view field of a photoelectric telescope includes:
a: and establishing a detection capability evaluation model of the single photoelectric telescope. Specifically, referring to fig. 2, the steps of establishing the single telescope detectability evaluation model are as follows:
a1: considering the position relation of the space debris relative to the photoelectric telescope and the sky-light-ground shadow relation; the position relation of the space debris relative to the photoelectric telescope is considered mainly to judge whether the space debris are in the visual field of the space telescope, and the sky-light-earth-shadow relation is considered to ensure that the photoelectric telescope can detect the space debris.
a2: on the basis that the space debris meets the position relationship and the sky-light-ground shadow relationship, calculating the light signal radiation quantity reflected by the space debris and received by the photoelectric telescope detector and the night-light background signal radiation quantity; in a2, the radiation quantity of the night light background signal mainly comprises the radiation quantity of galaxy, ecliptic light, airglow and atmospheric scattered light.
a3: calculating the signal-to-noise ratio of the space debris observed by the photoelectric telescope according to the radiation quantity of the optical signal and the radiation quantity of the night light background signal;
the formula of the space debris signal-to-noise ratio is as follows:
in the formula: r SN Is the space debris signal-to-noise ratio; s. the obj The radiation quantity of the optical signal reflected by the space debris received by the photoelectric telescope; s back Is night sky light background signal quantity; t is t int Is the exposure time; k is a radical of dark The current is the dark current of the photoelectric telescope detector; k is a radical of rdout The read noise of the photoelectric telescope detector is shown, and r is the photometric radius.
a4: and according to the space debris signal-to-noise ratio, simulating and calculating the number of the space debris detected by the photoelectric telescope, and outputting a simulation detection result of the space debris according to the number of the space debris.
The single telescope detection capability evaluation model is established through calculating the radiation quantity of optical signals reflected by space debris received by a photoelectric telescope detector and the night light background radiation quantity, calculating the signal-to-noise ratio of the space debris, comparing the calculated signal-to-noise ratio with a detection threshold value of the photoelectric telescope detector, and if the calculated signal-to-noise ratio is larger than the detection threshold value of the photoelectric telescope detector, indicating that the space debris in the field of view of the photoelectric telescope can be detected by the photoelectric telescope.
b: determining a value range pointed by a photoelectric telescope, and carrying out splicing combination design on a plurality of photoelectric telescope fields according to the value range pointed by the photoelectric telescope, wherein the photoelectric telescope points to an elevation angle comprising the photoelectric telescope and an azimuth angle comprising the photoelectric telescope; specifically, the field of view of the optical telescope is enlarged by splicing and combining a plurality of photoelectric telescope fields of view.
The method for determining the pointing value range of the photoelectric telescope comprises the following steps:
determining the value range of the elevation angle of the photoelectric telescope, and selecting the interval value Fov 1 Degree, according to a selected interval value
Starting, taking 1 interval point every 1 interval value, and generating an elevation sequence of the photoelectric telescope at least comprising 2 interval points;
determining the value range of the azimuth angle of the photoelectric telescope, and selecting the interval value Fov 2 Degree, according to the selected interval value
Starting, taking 1 interval point every 1 interval value, and generating a photoelectric telescope azimuth sequence at least comprising 2 interval points;
wherein the photoelectric telescope field of view is Fov 1 *Fov 2 Degree of square, fov 1 Is the value of the field of view of the photoelectric telescope in the elevation direction, and the unit is degree and Fov 2 The numerical value of the photoelectric telescope visual field in the azimuth direction is represented by degree.
Carry out concatenation combination design to a plurality of photoelectric telescope visual fields, include:
determining the pointing direction of each photoelectric telescope according to the acquired interval points within the value ranges of the elevation angle and the azimuth angle of the photoelectric telescope;
and splicing and combining the fields of view of the plurality of photoelectric telescopes according to the pointing direction of each photoelectric telescope.
The multiple telescope fields can be spliced and combined at will according to actual conditions.
More specifically, for example, in the step b, assuming that there are 3 × 2 photoelectric telescopes, the viewing field of the photoelectric telescope is 10 × 10 square degrees, the elevation angle of the photoelectric telescope ranges from 5 degrees to 25 degrees, and the interval value is 10 degrees, the generated elevation angle sequence of the photoelectric telescope includes interval points of 5 degrees, 15 degrees, and 25 degrees; the range of the azimuth angle of the photoelectric telescope is 5-25 degrees, and the interval value is 10 degrees, so that the generated azimuth angle sequence of the photoelectric telescope comprises 5 degrees, 15 degrees and 25 degrees of interval points; according to the obtained interval points, the directions of the photoelectric telescopes are determined as follows: (5, 15), (15, 15), (25, 15), (5, 25), (15, 25), (25, 25), according to the direction of each photoelectric telescope, a plurality of telescope visual fields are spliced and combined, and the photoelectric telescope visual field can be expanded to 30 × 20 square degrees.
c: according to the splicing combination design, scanning space debris by adopting a single elevation angle region or scanning space debris by adopting a multi-elevation angle region; specifically, the scanning modes include single-elevation area scanning and multi-elevation area scanning. The single elevation area scanning refers to that the elevation angle of the photoelectric telescope is fixed and the photoelectric telescope moves along the azimuth angle direction to scan in the scanning process, and the multi-elevation area scanning refers to that the scanning observation can be carried out along the elevation angle direction and the direction angle direction in the scanning process. Referring to fig. 3, the single elevation area scanning space debris step includes:
s1: all the photoelectric telescopes keep the respective initial elevation angles unchanged, and all the photoelectric telescopes move simultaneously along the respective azimuth angle directions every time from the initial azimuth angle
Scanning the space debris until the azimuth angle of the photoelectric telescope with the minimum initial azimuth angle is more than 360 degrees;
s2: returning the azimuth angle of the photoelectric telescope with the minimum initial azimuth angle to 0 degree, taking the photoelectric telescope with the minimum initial azimuth angle as the initial azimuth angle, subtracting 360 degrees from the azimuth angles of the rest photoelectric telescopes, taking the azimuth angle obtained by subtracting 360 degrees from the azimuth angles of the rest photoelectric telescopes as the initial azimuth angle, and repeating the step S1 until the simulation time is finished;
wherein A is 1t The elevation angle of the photoelectric telescope; a is the number of photoelectric telescopes placed along the azimuth direction.
Referring to fig. 4, the multi-elevation scanning space debris step includes:
p1: all the photoelectric telescopes keep the respective initial elevation angles unchangedStarting from the initial azimuth, all the photoelectric telescopes move simultaneously along the respective azimuth directions each time
Scanning the space debris until the azimuth angle of the photoelectric telescope with the minimum initial azimuth angle is more than 360 degrees;
p2: elevation angle increase of all photoelectric telescopes
Judging whether the elevation angle of the photoelectric telescope with the minimum initial elevation angle is larger than the maximum elevation angle in the elevation angle sequence of the photoelectric telescope, if so, finishing simulation, and if not, entering P3;
p3: all the photoelectric telescopes take the increased angles of elevation as initial elevation, the azimuth angle of the photoelectric telescope with the minimum initial azimuth angle is returned to 0 degree, the photoelectric telescope with the minimum initial azimuth angle takes 0 degree as the initial azimuth angle, the azimuth angles of the rest photoelectric telescopes subtract 360 degrees, the azimuth angles obtained by subtracting 360 degrees of the rest photoelectric telescopes serve as the initial azimuth angles, and the steps P1 and P2 are repeated;
wherein b is the number of the photoelectric telescopes arranged along the elevation direction.
d: and outputting a simulation detection result of the space debris according to the detection capability evaluation model of the single photoelectric telescope. Specifically, outputting the simulation detection result of the space debris includes:
respectively calculating the quantity of the space debris detected by the single photoelectric telescope in each scanning process by utilizing the detection capability evaluation model of the single photoelectric telescope according to the space debris scanned by the single elevation angle region or the space debris scanned by the multi-elevation angle region;
calculating the detection space debris quantity of all the photoelectric telescopes after the scanning is finished according to the space debris quantity detected by the single photoelectric telescope;
and outputting the simulation detection result of the space debris according to the detection space debris quantity of all the photoelectric telescopes.
The method comprises the steps that the number of detection space debris of all photoelectric telescopes after scanning is finished is obtained by adding the number of the space debris detected by a single photoelectric telescope in each scanning process, however, no matter single elevation angle area scanning space debris or multi-elevation angle area scanning space debris is adopted, in the simulation process, the space debris with the same number exists among the number of the space debris detected by different photoelectric telescopes, when the number of the detection space debris of all the photoelectric telescopes is calculated, the space debris with the same number is calculated only once, and reference suggestions are provided for the construction and observation strategies of the optical telescopes according to the total number of the detected space debris.
In addition, in practical application, by combining with a single photoelectric telescope detection capability evaluation model and designing a plurality of photoelectric telescope view field splicing combination modes and different scanning modes, the number of arc sections detected by the photoelectric telescope, the starting and stopping time of detection, the detection duration and the like can be output, and reference suggestions are provided for station layout, photoelectric telescope equipment performance parameter selection and observation strategy formulation.
The embodiment of the invention provides a performance simulation method for observing space debris by splicing visual fields of photoelectric telescopes, which comprises the steps of establishing a detection capability evaluation model of a single telescope, determining a value range pointed by the photoelectric telescope, splicing and combining the visual fields of the photoelectric telescopes, scanning the space debris by adopting a single elevation angle area or a multi-elevation angle area until simulation is finished, and outputting a simulation detection result of the space debris according to the established detection capability evaluation model of the single telescope. The method designs a field splicing combination mode and a scanning mode of the photoelectric telescope, combines a detection capability evaluation model of a single telescope, finally obtains the number of space debris detected by the photoelectric telescope combination, is beneficial to selection of basic parameters of the photoelectric telescope at the initial construction stage of observation equipment of the photoelectric telescope and selection of observation strategies during operation of the observation equipment, pre-evaluates the influence of the field splicing combination and different scanning modes of the photoelectric telescope on space debris observation, provides suggestions for space debris observation, and avoids observation waste.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (7)
1. A performance simulation method for observation space debris of a spliced view field of a photoelectric telescope is characterized by comprising the following steps:
establishing a detection capability evaluation model of a single photoelectric telescope;
determining a value range pointed by a photoelectric telescope, and performing splicing combination design on a plurality of photoelectric telescope view fields according to the value range pointed by the photoelectric telescope, wherein the photoelectric telescope points to an elevation angle and an azimuth angle of the photoelectric telescope;
according to the splicing combination design, scanning space debris by adopting a single elevation angle region or scanning space debris by adopting a multi-elevation angle region;
outputting a simulation detection result of the space debris according to the detection capability evaluation model of the single photoelectric telescope;
the method comprises the following steps of establishing a single telescope detection capability evaluation model, wherein the single telescope detection capability evaluation model comprises the following steps:
considering the position relation of the space debris relative to the photoelectric telescope and the sky-light-ground shadow relation;
on the basis that the space debris meet the position relationship and the sky-light-earth-shadow relationship, calculating the light signal radiation quantity reflected by the space debris and received by the photoelectric telescope detector and the night-light background signal radiation quantity;
calculating the signal-to-noise ratio of the space debris observed by the photoelectric telescope according to the radiation quantity of the optical signal and the radiation quantity of the night sky light background signal;
and according to the space debris signal-to-noise ratio, simulating and calculating the number of the space debris detected by the photoelectric telescope, and outputting a simulation detection result of the space debris according to the number of the space debris.
2. The method of claim 1, wherein the spatial debris signal-to-noise ratio is formulated as:
in the formula: r is SN Is the space debris signal-to-noise ratio; s obj The radiation quantity of the optical signal reflected by the space debris received by the photoelectric telescope detector; s back The radiation quantity of the background signal of the night sky light is shown; t is t int Is the exposure time; k is a radical of dark The current is the dark current of the photoelectric telescope detector; k is a radical of rdout The noise is the read-out noise of the photoelectric telescope detector; r is the photometric radius.
3. The method of claim 1, wherein the method for determining the range of values pointed by the electro-optical telescope comprises:
determining the value range of the elevation angle of the photoelectric telescope, and selecting the interval value Fov 1 Degree, according to a selected interval value
Starting, taking 1 interval point every 1 interval value, and generating an elevation sequence of the photoelectric telescope at least comprising 2 interval points;
determining the value range of the azimuth angle of the photoelectric telescope, and selecting the interval value Fov 2 Degree, according to a selected interval value
Starting, taking 1 interval point every 1 interval value, and generating a photoelectric telescope azimuth sequence at least comprising 2 interval points;
wherein the photoelectric telescope field of view is Fov 1 *Fov 2 Degree of square, fov 1 For the value of the field of view of the photoelectric telescope in the elevation direction, fov 2 The numerical value of the field of view of the photoelectric telescope in the azimuth direction is shown.
4. The method according to claim 3, wherein the stitching and combining the designs for the plurality of optoelectronic telescope fields of view comprises:
determining the pointing direction of each photoelectric telescope according to the acquired interval points within the value ranges of the elevation angle and the azimuth angle of the photoelectric telescope;
and splicing and combining the fields of view of the plurality of photoelectric telescopes according to the pointing direction of each photoelectric telescope.
5. The method of claim 3, wherein the single elevation region scanning for space debris comprises:
s1: all the photoelectric telescopes keep the respective initial elevation angles unchanged, and all the photoelectric telescopes move simultaneously along the respective azimuth angle directions every time from the initial azimuth angle
Scanning the space debris until the azimuth angle of the photoelectric telescope with the minimum initial azimuth angle is more than 360 degrees;
s2: returning the azimuth angle of the photoelectric telescope with the minimum initial azimuth angle to 0 degree, taking the photoelectric telescope with the minimum initial azimuth angle as the initial azimuth angle, subtracting 360 degrees from the azimuth angles of the rest photoelectric telescopes, taking the azimuth angles obtained by subtracting 360 degrees from the rest photoelectric telescopes as the initial azimuth angles, and repeating the step S1 until the simulation time is finished;
wherein A is 1t The elevation angle of the photoelectric telescope; a is the number of photoelectric telescopes placed along the azimuth direction.
6. The method of claim 5, wherein the multi-elevation region scanning for space debris comprises:
p1: all the photoelectric telescopes keep the respective initial elevation angles unchanged, and all the photoelectric telescopes move simultaneously along the respective azimuth angle directions every time from the initial azimuth angle
To spaceScanning the fragments until the azimuth angle of the photoelectric telescope with the minimum initial azimuth angle is larger than 360 degrees;
p2: elevation angle increase of all photoelectric telescopes
Judging whether the elevation angle of the photoelectric telescope with the minimum initial elevation angle is larger than the maximum elevation angle in the elevation angle sequence of the photoelectric telescope, if so, finishing simulation, and if not, entering P3;
p3: all the photoelectric telescopes take the increased angles of elevation as initial elevation, the azimuth angle of the photoelectric telescope with the minimum initial azimuth angle is returned to 0 degree, the photoelectric telescope with the minimum initial azimuth angle takes 0 degree as the initial azimuth angle, the azimuth angles of the rest photoelectric telescopes subtract 360 degrees, the azimuth angles obtained by subtracting 360 degrees of the rest photoelectric telescopes serve as the initial azimuth angles, and the steps P1 and P2 are repeated;
wherein b is the number of the photoelectric telescopes arranged along the elevation direction.
7. The method of claim 1, wherein outputting the simulated detection of space debris comprises:
respectively calculating the quantity of the space debris detected by the single photoelectric telescope in each scanning process by utilizing the detection capability evaluation model of the single photoelectric telescope according to the space debris scanned by the single elevation angle region or the space debris scanned by the multi-elevation angle region;
according to the number of the space debris detected by the single photoelectric telescope, the number of the detected space debris of all the photoelectric telescopes after scanning is finished is calculated;
and outputting the simulation detection result of the space debris according to the detection space debris quantity of all the photoelectric telescopes.
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| CN101980048A (en) * | 2010-09-29 | 2011-02-23 | 中国科学院国家天文台 | Antenna array forming technology-based ground-based radar system for space debris |
| CN103411896A (en) * | 2013-05-07 | 2013-11-27 | 浙江工业大学 | Method for acquiring ultra-low dispersion spectral signature of low-orbit space debris |
| CN105242278A (en) * | 2015-09-21 | 2016-01-13 | 电子科技大学 | Air-based space fragment optical detection and tracking system and method |
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